Thank you very much for your interest. I designed the DAC for my own pleasure, but Brian and I are happy to make it available to others.
Just wanted to touch on some design goals and features.
First this DAC is a Stereo DAC with all four of the chip's DAC outputs paralleled.
It can be used both as a voltage or current output DAC.
The DAC board includes no I/V stage, so you are free to use whatever you like.
I have created an I/V stage called the "IVY" which can be used with this DAC or really any voltage or current output DAC.
The IVY can be used (at least) 3 ways:
1) Stereo Balanced output
2) Stereo Single ended output
3) Mono Balanced output. This is accomplished by taking the analog signal in phase on one input and anti-phase on the other and taking the balanced output at what would normally be the SE outputs, so instead of stereo SE you get mono balanced. This is especially useful when using something like PCM1794(COD) or WM8741(opus) in mono mode.
The IVY is also designed to stack with the Buffalo for nice short connections.
The DAC can accept SPDIF, PCM(I2S etc), and DSD.
It can handle sampling frequencies up to 192khz with no reconfiguration required.
It has and I2C header for external control as well as a simple on board controller that does initial setup and the goes to sleep for low noise.
Thats all I can think of for now.
I will be posting more later.